DSIP vs MK-677 (Ibutamoren)
Side-by-side comparison of key properties, dosing, and research.
Sleep OptimizationCognitive Enhancement
DSIPGrowth Hormone Peptides
MK-677 (Ibutamoren)- Summary
- DSIP is an endogenous neuropeptide originally isolated from rabbit cerebrospinal fluid that induces delta-wave (deep) sleep. It also modulates stress response, cortisol regulation, and LH secretion, making it valuable for sleep optimization and stress management.
- MK-677 (Ibutamoren) is an orally active, non-peptide ghrelin receptor agonist that increases growth hormone and IGF-1 levels. Unlike injectable GHRPs, it can be taken orally and has a 24-hour half-life, making it convenient for sustained GH optimization.
- Half-Life
- ~30–60 minutes; however downstream sleep effects last 4–6 hours
- 24 hours
- Admin Route
- SubQ, IV, Intranasal
- Oral
- Research
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- Typical Dose
- 100–400 mcg
- 10–25 mg
- Frequency
- Once nightly
- Once daily
- Key Benefits
- Induces and deepens delta-wave (slow-wave) sleep
- Reduces cortisol and normalizes HPA axis
- Improves sleep quality in insomnia patients
- Anti-stress and anxiolytic effects
- May improve opiate/alcohol withdrawal symptoms
- Analgesic properties through opioid modulation
- Antioxidant and neuroprotective effects
- Increases lean muscle mass
- Enhances bone density
- Improves sleep quality and REM sleep
- Accelerates recovery from training
- Increases appetite
- May improve skin elasticity and appearance
- Supports fat loss while maintaining muscle
- Oral administration — no injections required
- 24-hour half-life allows once-daily dosing
- Side Effects
- Generally well tolerated
- Mild grogginess next morning at higher doses
- Rare: hypotension
- Potential for altered dream patterns
- Increased appetite (significant in some users)
- Water retention and puffiness
- Elevated blood glucose / insulin resistance (monitor in diabetics)
- Lethargy initially
- +2 more
- Stacks With
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